New approach for consideration of adsorption/desorption data

Baleanu, Mihaela-Cristina; Nigmatullin, Raoul R.; Okur, Salih; Ocakoğlu, Kasım

doi:10.1016/j.cnsns.2011.02.030

Cited by 7 publications

(5 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…If the initial data are presented in the form of the trendless noise, then the simple integration procedure taken with respect to its mean value suppresses the high frequencies and the integrated data can be fitted by the function (1). In addition, for obtaining the desired smoothed signals, one can apply the reduction procedure to three incident points (R-3IP) [36] and to the procedure of the optimal linear smoothing (POLS) applied successfully in paper [37]. The combination of these two methods (as discussed below for acoustic data) allows to extract the low-frequency envelopes that will be used for fitting purposes by the NAFASS method.…”

Section: Results and Verification On Real Datamentioning

confidence: 99%

“…For treatment of these data, we reduced the initial data to three incident points (R-3IP). This method was described in paper [36]. It helps to receive three types of data: (a) the distribution of the upper amplitudes (Yup); (b) the distribution of the down amplitudes (Ydn); and (c) the averaged amplitudes (Ymn).…”

Section: The Treatment Of Acoustic Datamentioning

confidence: 99%

“…This procedure helps to extract the low-frequency envelopes. After that, we applied the optimal linear smoothing procedure (POLS), which was described in papers [36,37]. The POLS method helps to smooth initial data, to partly remove the high-frequency fluctuations, and to receive the desired low-frequency envelopes.…”

Section: The Treatment Of Acoustic Datamentioning

confidence: 99%

See 2 more Smart Citations

Approximation of Aperiodic Signals Using Non-Integer Harmonic Series: The Generalized NAFASS Approach

2023

Self Cite

View full text Add to dashboard Cite

In this paper, the non-orthogonal amplitude-frequency analysis of smoothed signals (NAFASS) method) is used to approximate discrete aperiodic signals from various complex systems with the non-integer harmonic series (NIHS). When approximating by the NIHS, there is a problem in determining the dispersion law for harmonic frequencies. In the original version of the NAFASS approach, the frequency dispersion law was determined from a linear-difference equation. However, many complex systems in nature have frequency distributions that differ from the linear law, which is used in the conventional Fourier analysis of periodic signals. This paper proposes a generalization of the NAFASS method for describing aperiodic signals by the NIHS with a frequency distribution that satisfies a recursive formula, which coincides with the local generalized geometric mean (GGM). The methodology of the generalized NAFASS method is demonstrated using descriptions of financial data (prices for metals) and sound data (sounds of insects) as examples. The results show the effectiveness of the generalized NAFASS approach for describing real-world time data. This discovery allows us to propose a new classification scheme for smoothed and aperiodic signals captured as responses and envelopes from various complex systems.

show abstract

Section: Results and Verification On Real Datamentioning

confidence: 99%

Section: The Treatment Of Acoustic Datamentioning

confidence: 99%

See 1 more Smart Citation

Approximation of Aperiodic Signals Using Non-Integer Harmonic Series: The Generalized NAFASS Approach

2023

Self Cite

View full text Add to dashboard Cite

show abstract

“…The Langmuir adsorption isotherm model has been frequently used 23,[34][35][36][37] for various gases such as humidity on organic or inorganic films to describe adsorption kinetics. According to this model, the rate of surface reaction to form a monolayer on the surface is given using the following equations:…”

Section: Sensing Properties Of Metal Oxide Nanofibersmentioning

confidence: 99%

VOC sensors based on a metal oxide nanofibrous membrane/QCM system prepared by electrospinning

et al. 2014

Self Cite

View full text Add to dashboard Cite

aeWe report a simple synthetic route to fabricate crystalline ZnO and CeO 2 /ZnO nanofibrous mats and their sensing characteristics against volatile organic compounds (VOCs) such as benzene, propanol, ethanol, and dichloromethane. Precursor fibers were fabricated by electrospinning of poly(vinyl alcohol) and metal salt(s) at 2.5 kV cm À1 in aqueous solution. The fibers were directly deposited on the crystal surface of a quartz crystal microbalance (QCM). The crystal, which was coated by nanostructured PVA/metal precursor(s) fibers, was subjected to calcination in air at 500 1C for 5 h. The formation of an oxide based nanofiber mat was revealed by scanning electron microscopy and X-ray diffraction. Upon exposure of the nanofiber mats to the VOCs, the compounds adsorbed onto the surface of oxidic fibers. The physisorption of the compounds was confirmed by FTIR and QCM. Both systems showed sensitivity to the VOCs and they hold a broad promise particularly for sensing applications of volatile alcoholic compounds. The introduction of CeO 2 into the ZnO structure reduced the sensitivity of ZnO most probably due to the decrement of oxygen vacancies.

show abstract

“…Recently, several generalizations of the Langmuir model within the time scale calculus have been proposed in [2]. In addition, the Langmuir model was also modified in [3,4] by taking into account some nonlinear effects such as diffusion and condensation.…”

Section: Introductionmentioning

confidence: 99%

The Perturbed Riemann Problem for the Chromatography System of Langmuir Isotherm with one Inert Component

Ji¹,

Shen²

2016

J. Nonlinear Sci. Appl.

View full text Add to dashboard Cite

The solutions of the perturbed Riemann problem for the chromatography system of Langmuir isotherm with one inert component are constructed in completely explicit forms when the initial data are taken as three piecewise constant states. The wave interaction problem is investigated in detail by using the method of characteristics. In addition, the generalized Riemann problem with the delta-type initial data is considered and the delta contact discontinuity is discovered. Moreover, the strength of delta contact discontinuity decreases linearly at a constant rate and then the delta contact discontinuity degenerates to be the contact discontinuity when across the critical point. c 2016 all rights reserved.

show abstract

New approach for consideration of adsorption/desorption data

Cited by 7 publications

References 19 publications

Approximation of Aperiodic Signals Using Non-Integer Harmonic Series: The Generalized NAFASS Approach

Approximation of Aperiodic Signals Using Non-Integer Harmonic Series: The Generalized NAFASS Approach

VOC sensors based on a metal oxide nanofibrous membrane/QCM system prepared by electrospinning

The Perturbed Riemann Problem for the Chromatography System of Langmuir Isotherm with one Inert Component

Contact Info

Product

Resources

About